WO2020228730A1

WO2020228730A1 - Driving apparatus, camera module, electronic device and driving apparatus assembly method

Info

Publication number: WO2020228730A1
Application number: PCT/CN2020/089973
Authority: WO
Inventors: 王在伟; 周聚鹤
Original assignee: 新思考电机有限公司
Priority date: 2019-05-14
Filing date: 2020-05-13
Publication date: 2020-11-19
Also published as: KR20210022689A; KR102483453B1; CN111948873A

Abstract

A driving apparatus, a camera module, an electronic device, and a driving apparatus assembly method, wherein the driving apparatus comprises a base (10), Hall elements (11) and a housing (22); the housing (22) covers the base (10); the base (10) comprises a base body (102) and conductors (104); the Hall elements (11) are electrically connected to the conductors (104); the housing (22) is provided with notch sections (222); and the Hall elements (11) are exposed to the outside of the housing (11) from the notch sections (222). Since the Hall elements (11) are exposed to the outside of the housing (22), when assembling the driving apparatus, other components of the driving apparatus may be assembled first, and the Hall elements (11) are then installed after the measurements of various parameters of the driving apparatus reach a standard. If the measurements of various parameters do not reach the standard, the Hall elements (11) may not be installed, thereby preventing the waste of Hall elements (11) and saving on costs.

Description

Drive device, camera module, electronic equipment and drive device assembly method

Technical field

The present invention relates to the field of imaging technology, in particular to a driving device, a camera module, an electronic device and a driving device assembly method.

Background technique

With the advancement of science and technology, the application of camera modules has become more and more extensive. At present, in addition to cameras, mobile phones, computers and other electronic devices are equipped with camera modules to facilitate people taking pictures anytime, anywhere, and bring convenience to people’s lives. With fun. The camera module includes a fixed focal length (FF) camera module and an auto-focus (AF) camera module. In the auto-focus camera module, the lens can be moved by a driving device to achieve focusing.

The voice coil motor of the focus camera module has two types: open loop motor and closed loop motor. The open-loop motor changes the magnetic field force by the magnitude of the current so that the motor pushes the lens to shift and focus, but the current input by the motor is displacement. There is no feedback process, there is an error, and the accuracy is not enough. A Hall chip is added to the closed loop motor. The Hall chip can sense the actual displacement of the lens. The motor can continuously adjust the motor and adjust the position of the lens according to the feedback of the Hall chip to keep the actual position of the lens consistent with the input position.

In a driving device, the base structure is covered by the housing, and the Hall element is arranged on the side of the base away from the housing, and needs to be installed on the side wall of the base in advance, and finally the base and the housing are glued together. However, the test will only be conducted after the drive unit is assembled and the base shell is glued. During the test, there is a poor performance AF (autofocus) motor structure or a poor performance structure. If this happens, it is not just the AF drive that is wasted. The device also includes Hall components, causing a great waste of cost.

The foregoing description is to provide general background information and does not necessarily constitute prior art.

Summary of the invention

The object of the present invention is to provide a driving device, a camera module, an electronic device, and a driving device assembly method that can be installed with Hall elements to prevent waste.

The present invention provides a driving device, which includes a base, a Hall element, and a housing. The housing is covered on the base. The base includes a base and a conductor. The Hall element is electrically connected to the conductor. The housing is provided with a notch, and the Hall element is exposed from the housing from the notch.

In one of the embodiments, the base body includes a side wall, the side wall is provided with an opening corresponding to the notch, and the Hall element is provided on the outer side of the side wall and is located in the opening The part is electrically connected with the conductor.

In one of the embodiments, the side wall has an inner and outer two-layer structure, which includes an inner layer and an outer layer, the edge of the inner layer extends beyond the edge of the outer layer, and the outer shell covers the edge of the inner layer .

In one of the embodiments, the base includes two opposite side walls.

In one of the embodiments, the driving device further includes a lower spring, a carrier, a coil, a magnet, and an upper spring. The lower spring is elastically arranged between the base and the carrier, and the carrier can be opposed to the base. Movably arranged on the base, the upper spring is elastically arranged between the carrier and the housing, the coil is arranged on the carrier, the magnet is arranged in the housing, and the magnet Corresponding to the coil, the housing is arranged on the base, and the lower spring, the carrier, the coil, the magnet and the upper spring are all located in the housing.

In one of the embodiments, the electrical conductor includes a first terminal and a second terminal, the first terminal electrically connects an external circuit to the Hall element, and the second terminal enables the Hall element 11 It is electrically connected to the lower spring.

In one of the embodiments, the Hall element is installed in the opening, and the first terminal is at least partially exposed at the opening.

In one of the embodiments, there are two second terminals, two lower springs, one second terminal is electrically connected to one of the two lower springs, and the other first Two terminals are electrically connected to the other lower spring, one of the two lower springs is electrically connected to one end of the coil, and the other lower spring 12 is electrically connected to the other end of the coil 16 .

The present invention also provides a camera module including the above-mentioned driving device.

The present invention also provides an electronic device including the above-mentioned camera module.

The present invention also provides a method for assembling a driving device, including the steps:

Provide a base and a shell, and assemble them together, the base includes a base and a conductor, and the shell is provided with a notch;

Test various parameters of the drive device and determine whether each parameter meets the standard;

When the various parameters reach the standard, a Hall element is provided, and the Hall element is installed on the base from the notch of the housing, so that the Hall element is electrically connected to the conductor , And exposed from the shell from the notch.

In the drive device, camera module, electronic equipment, and drive device assembly method of the present invention, since the Hall element is exposed outside the housing, other components of the drive device can be assembled first when the drive device is assembled, and each of the drive device The Hall element is installed after the parameter measurement reaches the standard. If the measurement of the various parameters does not meet the standard, the Hall element can be installed, which avoids the waste of the Hall element and saves the cost.

Description of the drawings

Fig. 1 is an assembly diagram of a driving device according to a first embodiment of the present invention.

Fig. 2 is a perspective exploded schematic view of the driving device shown in Fig. 1.

Fig. 3 is an exploded structure diagram of the base of the driving device shown in Fig. 1.

Fig. 4 is a top view of the driving device shown in Fig. 1.

Fig. 5 is a sectional view taken along the line V-V in Fig. 4;

FIG. 6 is a flowchart of a method for assembling a driving device according to a second embodiment of the invention.

Detailed ways

The specific embodiments of the present invention will be described in further detail below in conjunction with the drawings and embodiments. The following examples are used to illustrate the present invention, but not to limit the scope of the present invention.

First embodiment

1 to 5, the driving device provided in an embodiment of the present invention includes a base 10, a Hall element 11, a lower spring 12, a carrier 14, a coil 16, a magnet 18, an upper spring 20, and a housing 22. The lower spring 12 is elastically arranged between the base 10 and the carrier 14. The carrier 14 is movably disposed on the base 10 relative to the base 10. The upper spring 20 is elastically arranged between the carrier 14 and the housing 22, the coil 16 is arranged on the carrier 14, the magnet 18 is arranged in the housing 22, and the magnet 18 and the coil 16 are arranged correspondingly, the housing 22 is arranged on the base 10, and the lower spring 12. The carrier 14, the coil 16, the magnet 18 and the upper spring 20 are all located in the housing 22.

The base 10 includes a base 102 and a conductor 104. The base 102 includes a side wall 106. The side wall 106 is provided with an opening 108. The Hall element 11 is provided on the outside of the side wall 106 and is electrically connected to the conductor 104 at the opening 108. Sexual connection,

The housing 22 is provided with a notch 222 at a position corresponding to the opening 108, and the Hall element 11 is exposed from the housing 22 from the notch 222.

In this embodiment, the base 10 includes two opposite side walls 106, and only one side wall 106 is provided with an opening 108. More specifically, the side wall 106 has an inner and outer two-layer structure, which includes an inner layer 111 and an outer layer 112. The edge of the inner layer 111 extends beyond the edge of the outer layer 112, so that when the shell 22 is placed on the base 10, the shell 22 covers the inner layer. At the edge of the layer 111, and the outer layer 112 is completely exposed, even if the shell 22 is provided with a notch 222, the sealing of the driving device can still be ensured, and dust and water vapor can be prevented from entering the drive from the connection between the shell 22 and the side wall 106. Inside the device.

The base 102 of the base 10 is also provided with a protrusion 114 to fix the lower spring 12.

The conductive body 104 of the base 10 is embedded in the base body 102, and specifically, it can be integrally formed by means of injection molding (insert molding). The conductor 104 includes a first terminal 116 and a second terminal 118. The first terminal 116 is electrically connected to the Hall element 11 to electrically connect the Hall element 11 with an external circuit, and the second terminal 118 is electrically connected to the lower spring 12. To electrically connect the coil 16 electrically connected to the lower spring 12 with the Hall element 11.

Ground, there are four first terminals 116 corresponding to the positions of the opening 108. The first terminals 116 can be exposed at least partially at the opening 108 to be electrically connected to the Hall element 11 installed in the opening 108. There are two second terminals 118, which are electrically connected to the Hall element 11. The conductor 104 further includes a connecting arm 119, and the second terminals 118 are respectively connected to the two connecting arms 119.

In this embodiment, the Hall element 11 may specifically include a Hall sensor. The Hall element 11 and the Hall element 11 are opposed to each other, and the position change of the position detection magnet not shown on the carrier 14 can be obtained and fed back to the driving device. The driving device can be continuously adjusted according to the feedback of the Hall element 11 The driving device adjusts the position of the carrier 14 on which the lens is installed, so that the actual position of the lens is consistent with the input position, thereby realizing closed-loop control of the driving device.

In this embodiment, there are two lower springs 12, one end of each lower spring 12 is fixedly connected to the base 10, and the other end is fixedly connected to the carrier 14. The lower spring 12 can support the carrier 14 and also allow the carrier 14 to face each other. The base 10 moves. Specifically, the lower spring 12 includes a first inner ring, a first connecting deformation portion, and a first outer ring. The connecting deformation portion is deformable and is connected between the first inner ring and the first outer ring. The first outer ring is fixed. Connected to the base 10, the first inner ring is fixedly connected to the carrier 14. More specifically, the lower spring 12 is provided with a clamping hole 122, and the protrusion 114 of the base 10 is clamped into the clamping hole 122.

Specifically, one second terminal 118 is electrically connected to one of the two lower springs 12 in turn, the other second terminal 118 is electrically connected to one lower spring 12, and one of the two lower springs 12 is electrically connected to One end of the coil 16 and the other lower spring 12 are electrically connected to the other end of the coil 16, and can be electrically connected to the coil 16 through the Hall element 11. When the coil 16 is energized, the coil 16 can interact with the magnet 18 when the coil 16 is energized to generate a force to move the carrier 14 up and down to achieve focusing. More specifically, the connecting arm 119 of one second terminal 118 is electrically connected to one of the two lower springs 12, and the other second terminal 118 is also electrically connected to the other lower spring 12 through the connecting arm 119.

In this embodiment, the carrier 14 is used to mount a lens (not shown) to drive the lens to move up and down to achieve focusing.

In this embodiment, the coil 16 is wound around the outside of the carrier 14. It can be understood that the coil 16 can also be arranged in other ways, and is not limited to being wound on the outside of the carrier 14.

In this embodiment, the magnet 18 is provided corresponding to the coil 16 and is located outside the coil 16. Specifically, the magnet 18 may be fixed in the housing 22. Specifically, in this embodiment, there are two magnets 18, and the two magnets 18 are provided on two opposite sides of the carrier 14.

In this embodiment, the upper spring 20 is an integral structure, one end of which is fixedly connected to the carrier 14 and the other end is fixedly connected to the housing 22 to allow the carrier 14 to move relative to the housing 22. Specifically, the upper spring 20 includes a second inner ring, a second connecting deformation portion, and a second outer ring. The second connecting deformation portion is deformable and is connected between the second inner ring and the second outer ring. The ring is fixedly connected to the housing 22 and the second inner ring is fixedly connected to the carrier 14.

In this embodiment, the housing 22 is provided with outer walls 224 on the other two sides where the notch 222 is not provided, and the outer walls 224 are wrapped around the base 10 to ensure the tightness of the driving device.

In this driving device, since the Hall element 11 is exposed outside the housing 22, when assembling the driving device, the other parts of the driving device can be assembled first, and the parameters of the driving device are measured to reach the standard before installing the Hall element 11. If the measurement of various parameters does not meet the standards, the Hall element 11 may not be installed, which avoids the waste of the Hall element and saves costs.

It can be understood that the opening 108 may not be provided on the base 102, and the conductor 104 may be extended to the outside of the base 102. In this way, the Hall element 11 can also be installed through the notch 222 of the housing 22 and electrically connected to the conductor 104 .

It is understandable that the driving device can also be a ball-type motor or a memory metal motor and other structural drive devices. In a ball-type motor, it may not include a lower spring, an upper spring, etc., and a memory metal motor may not include a lower spring. , Coil, upper spring, magnet and other structures.

Second embodiment

The present invention also provides a driving device assembly method. Please refer to FIG. 6. The driving device assembly method of the second embodiment of the present invention includes the following steps:

S11: Provide the base 10, the lower spring 12, the carrier 14, the coil 16, the magnet 18, the upper spring 20 and the housing 22, and assemble them together to form a pre-assembled drive device. Specifically, the lower spring 12 is elastically arranged between the base 10 and the carrier 14, the carrier 14 is arranged on the base 10 movably relative to the base 10, and the upper spring 20 is elastically arranged between the carrier 14 and the housing 22, and the coil 16 is set on the carrier 14, the magnet 18 is set in the housing 22, so that the magnet 18 and the coil 16 are arranged correspondingly, and finally the housing 22 is placed on the base 10, so that the lower spring 12, the carrier 14, the coil 16, the magnet 18 and The upper springs 20 are all located in the housing 22. The base 10 includes a base 102 and a conductor 104. The base 102 includes a side wall 106. The side wall 106 is provided with an opening 108. The housing 22 is provided with a notch 222 at a position corresponding to the opening 108.

The structure of the drive device manufactured by the drive device assembly method is the same as the structure of the drive device of the first embodiment, and will not be repeated here.

S13, test various parameters of the pre-installed drive device, and judge whether each parameter meets the standard.

S15. When the above parameters meet the standards, provide the Hall element 11, and install the Hall element 11 on the base 10 from the notch 222 of the housing 22, so that the Hall element 11 and the conductor 104 are electrically connected, and from the notch The part 222 is exposed outside the housing 22. Specifically, the Hall element 11 is provided on the outside of the side wall 106 and at the opening 108.

In the driving device assembly method, since the other parts of the driving device are assembled first, and the measurement of the parameters of the driving device reaches the standard, then the Hall element 11 is installed. If the measurement of the various parameters does not meet the standard, the Hall element 11 may not be installed. , To avoid the waste of the Hall element and save the cost.

It can be understood that the driving device assembly method of the present invention can also be adapted to the assembly of other structures such as ball motors or memory metal motors. In ball motors, the upper spring and lower spring may not be included. Among them, it may not contain lower springs, coils, upper springs, magnets and other structures.

In the drawings, the sizes and relative sizes of layers and regions are exaggerated for clarity. It should be understood that when an element such as a layer, region, or substrate is referred to as being "formed on," "disposed on," or "on" another element, the element can be directly disposed on the other element, or There may be intermediate elements. In contrast, when an element is referred to as being "directly formed on" or "directly disposed on" another element, there are no intervening elements.

In this article, unless expressly stipulated and limited otherwise, the terms "installed", "connected" and "connected" shall be interpreted broadly, for example, it may be a fixed connection, a detachable connection, or an integral connection; It is a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms can be understood in specific situations.

In this article, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", The orientation or positional relationship indicated by "horizontal" is based on the orientation or positional relationship shown in the drawings, which is only for the clarity of the technical solution and the convenience of description, and therefore cannot be understood as a limitation of the present invention.

In this article, the sequential adjectives "first" and "second" used to describe elements are only used to distinguish elements with similar attributes, and do not mean that the elements described in this way must be in a given order, or time, space, Level or other restrictions.

In this document, unless otherwise specified, "plurality" and "several" mean two or more.

In this article, the terms "include", "include", or any other variations thereof are intended to encompass non-exclusive inclusion, in addition to including those elements listed, but also other elements not explicitly listed.

The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, All should be considered as the scope of this specification.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. It should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

A driving device, characterized in that it comprises a base (10), a Hall element (11) and a housing (22), the housing (22) is arranged on the base (10), and the base (10) It includes a base body (102) and a conductor (104). The Hall element (11) is electrically connected to the conductor (104). The housing (22) is provided with a notch (222). The element (11) is exposed from the housing (22) from the notch (222).
The driving device according to claim 1, wherein the base body (102) includes a side wall (106), and the side wall (106) is provided with an opening (222) corresponding to the notch (222). 108), the Hall element (11) is disposed on the outside of the side wall (106), and is electrically connected to the conductor (104) at the opening (108).
The driving device according to claim 2, characterized in that the side wall (106) has a two-layer structure inside and outside, which includes an inner layer (111) and an outer layer (112), and the edge of the inner layer (111) Beyond the edge of the outer layer (112), the outer shell (22) covers the edge of the inner layer (111).
The driving device according to claim 3, wherein the base (10) includes two opposite side walls (106).
The driving device according to claim 2, wherein the driving device further comprises a lower spring (12), a carrier (14), a coil (16), a magnet (18) and an upper spring (20), and the lower The spring (12) is elastically arranged between the base (10) and the carrier (14), and the carrier (14) is movably arranged on the base (10) relative to the base (10), so The spring (20) is elastically arranged between the carrier (14) and the housing (22), the coil (16) is arranged on the carrier (14), and the magnet (18) is arranged on the carrier (14). In the housing (22), and the magnet (18) is arranged corresponding to the coil (16), the housing (22) is arranged on the base (10), the lower spring (12), the The carrier (14), the coil (16), the magnet (18) and the upper spring (20) are all located in the housing (22).
The driving device of claim 5, wherein the conductor (104) includes a first terminal (116) and a second terminal (118), and the first terminal (116) electrically connects an external circuit In the Hall element (11), the second terminal (118) electrically connects the Hall element (11) to the lower spring (12).
The driving device according to claim 6, wherein the Hall element (11) is installed in the opening (108), and the first terminal (116) is at least partially exposed in the opening ( 108) places.
The driving device according to claim 6, wherein there are two second terminals (118), two lower springs (12), and one second terminal (118) is electrically connected in sequence In one of the two lower springs (12), the other second terminal (118) is electrically connected to the other lower spring (12), one of the two lower springs (12) It is electrically connected to one end of the coil (16), and the other lower spring (12) is electrically connected to the other end of the coil (16).
A camera module, characterized by comprising the driving device of any one of claims 1-8.
An electronic device, characterized by comprising the camera module of claim 9.
A method for assembling a driving device is characterized in that it comprises the following steps:

Provide a base (10) and a housing (22), and assemble them together, the base (10) includes a base (102) and a conductor (104), and the housing (22) is provided with a notch (222);

Test various parameters of the drive device and determine whether each parameter meets the standard;

When the various parameters reach the standard, a Hall element (11) is provided, and the Hall element (11) is installed on the base (10) from the notch (222) of the housing (22) , The Hall element (11) is electrically connected to the conductor (104), and exposed from the housing (22) from the notch (222).